Chain-severing mechanism for sewing-machines.



D. S. SEYMOUR. .CHAIN SEVERING MECHANISM FOR SEWING MACHINES.

APPLICATION HLED JAN. 6,1910.

Patented Feb. 1, 1916.

2 SHEETS-SHEET l .0. s. SEYMOUR. CHAIN SEVERING MECHANISM FORSEWING MACHINES.

APPLICATION HlLED JAN. 6. NH]. I I 1,170,349; Patented Feb. 1, 1916.

2 SHEETS-SHEET 2.

UNITED STATES rn rnn'r OFFICE.

DUDLEY S. SEYMOUR, 01 OAK PARK, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGCJ, ILLINOIS, .A CORPORATION OF ILLINOIS.

.CHAIN-SEVERING IVIEfJHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

rammed Feb. 1, rain.

Application filed January 6, 1910. Serial No. 536,766.

To all whom it may concern:

Be it. known that I, DUDLEY S. SEYMOUR, a citizen of the United States, residing at Oak Park, injthe county of Cook, State of Illinois, have invented certain new and useful Improvements in Chain-severing Mechanism for Sewing-Machines, of which the following is'a description, reference being had 'to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to an improvement in sewing machines, and while the invention has been especially devised by me for use in severing the chain of stitching between two consecutive bags on the filled bag sewing apparatus illustrated in application filed by C. McNeil, Januarybtlnidll), Serial No. 536,669, nevertheless I do not desire to bc thus limited in its application, as the invention is applicable to other uses than that thus specifically mentioned.

The herein described chain-severing mechanism comprises a moving member and a stationary member, the former being operated from a feeding mechanism such as illus trated in my application for Letters Patent filed June 12th, 1909, Serial No. 501,817, and so far as the details of construction are concerned, the invention consists in the mechanism whereby the movable member of the severing device is connected to andop- "erat'ed from the feed dog-operating mechanism, illustrated in said application.

Looking at the invention from another standpoint, it embodies certain novel features of construction of the feed dog bars,

whereby the chain to bescvcrcd is accurately.

guided to a plane on the opposite side of the feed dog from its feeding surface into the path of the moving member.

Finally, looking at the invention from the standpoint of its adaptability to a filled bag sewing apparatus, such as shown 1n application Serial No. 536,609, above referred to, the invention consists in the combination with a means for tilting the bag laterally after it has been sewed, of the severing device so located with respect thereto on the opposite side of the feed dog from the bag mouth, that the tilting of the bag will draw the chain taut, and into the space between the front and rear feed dog, where the cutter operates.

, ing frame 26,

It will be seen that this particular chainsevering device contains several novel features in connectionwith its application to filled bag sewing apparatus; but, furthermore, as a severing device 7167' so is applicable to a sewing machine, no matter to what use the latter may be put.

The invention, therefpre, consists in the matters hereinafter described and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which,

' Figure l is an end view partly in section, of a portionof a sewing machine to which my invention is applied; Fig. 2 is a side view taken from the right of Fig. 1, the inclosing casing being removed; Fig. 3 is a detail view, showing the manner of securing the knife; Fig. t is a plan view of Fig. 1; Fig. 5 is a perspective view of a filled bagsewing apparatus, showing the application of myinvention thereto, with the means for automaticall y drawing the chain of stitching into the path of the cutter; and Fig.6 is a plan view of the throat plate and feed dogs.

In these drawings, 25 represents the front feed dog bar and 25 the two-part rear feed dog bar, between which two parts of the rear feed dog is left a space to allow the chain of stitching after the bag has been formed, to drop or be drawn betweenthem, and into the open space A. between the front and rear opening 7) between them beneath which opening the chain-severing device operates. It also has the needle opening 0. Said feed dogs 25 and 25 are carried by the laterally extending arm 3 of the feed dog supportwhich is pivoted at its front end to a rocking frame 27, which in turn is pivoted at 28 to a bracket 29, formed on the inner face of the cylindrical bed plate. The

feed dog carrying frame 26 is pivoted near its front end to a link 31, by means of a pivot pin 32. The other end of the link 31 is connected by a pivot pin to an arm 34, carried by the rock shaft 35, oscillated in the manner set forth in my application Serial No. 501,817, throughthc arm-34 and link 31, to raise and lower the front end of the aecu ing celery. Heme v cf Wnlen or shaft E,

the meli'lGlDb-llli wiring L hung; aa ustaifiy chnnped The Oscillation of the neck U10 arm 34, and its part the ball joint connecchm ewinging the frame 1) on reciprocating the knife men'xeer H, beck and. fm'ih. across Ehe Space between iahe ferwmfd and rear feed dogs beneath the lfifiOli; plate.

loiiperating with this recipreeajng knife member is :1 stationery knife L mljustebiy secured in a slot in the c; Ag by the clamp, .ing screw 7a The reciprocating knife is hem uner -23e11- 'zion. of spring 6', around the shaft E, in 2: manner Well Linc-W11, to 110311 it laterally inst the face of the smfiionary Imife I, 2mithe prayer shear cut wiii he made to the chain 0:? stitching which has ed 017' drawn down between the u 0f inhe rear feed (1 i. the ace Ween the two -feed (legs, in which space 'eveiiing' device epez'etee,

evices shove described are iwsigned. for use in cmme time with an M; apparatus for conveying and sewefi. sacks, as iHusn-ateci in applicapatent Serial Number 5361561), above -1ed":o, .Such an mrzsn ei-nent shown 5 in Whieh the see f echine M, containing '23 the mechenisz'n 3m inusly described me is set in the 39L (m therein shown, and overl'mngs a conv' heifi- N which conveys the to the stitch-forming mechanism, and v after they have been stitched tilts jhem hltemlly :mixmmtically by means of the filter been U which is so arranged that as the beg tilts, it draws the chain of stitchingteuh and intuthe path of movement of the with edge of the reciproceth xg knife member h, and severe the chain.

Having thus described my invention, What I claim as new and desire to secure by Lee ters Patent, i s:-- v

1. A sewing machine inc-1m nation, a, threat plate, feed in cemhi- (Emcee,

q means for raising and lower Y feeding; device inchuhng a rock Sheri?" W TGQPIO crating the same, a

with e chxdim a c2153; at reign-b 2mg? plate, and mem er,

' '11 said wit? 1;. Wk ehy cuttieg n3 i L5 in mus-0n whzf, the male) i-elmg W. the feeding de 1;: device, an am'n i129; and. i

' shaft, :1, pivuicd (amen cutting; mum-- n 121s pn'et 1n the mach her: for em; a. flame 3. A cutting memhe plane caressing; fl'zmle fix:- Whfieh head hm'h the frame secured I conneeiien WE 4, A sewing; vice, with means i in combinmtien 1c including m cm to which. the e free jei1 a rock 511%.: said 1 having: the head, mic neevf-ions w the machine, fur misingm ing device. e msm sceurefi th an arm a .nrce mm fig a fcea 'ng demi lowering it, wming device 1 feted flmnea feed having in fee frame, arr-11%, AAL'HEL warm to it, let e0. nection with a'ieec0n.--

a will amid fee {L rock simft, an g eennectlons to g; and LOWBIlIlg m extension a head. fr eh; p {L- came a iso f eely w. A zmzl pivoted zuso te etei-ior lee machine ii'mme, 121.. emfing member zred to the 1 111 me,

In arm secuw widens to Q! w 9% ing;

. 1 extension. 9,

av frame also and pi'voted the machine med 10 the frame, a 021* frame, emi Q, ah. scoured :0 1th 7'. In combzm including from; c; latter ha ving e front rear d chain-severing day the space between '6 e free the chain ofseiiachihg to he deflected through the recess between the rear feed dogs.

8. In cembinetien with T including mm and me dogs, the 111, and the separated, "a v in feerfing device f eding device '3 1 dogs, the lat-- 1' 7 front and rear dogs being separated, a chainsevering device arranged to operate in the space between the front and rear'dogs, the

chain of stitching to be severed being defiected'through the recess between the rear,

feed dogs, said chain-severing device being operated from the. same mechanism which ope ates the feed dogs.

9. A feeding device, comprising front and rear feed dogs, separated from each other, the rear feed dogs being made in two parts with a longitudinal recess between to permit of the passage therethrough of the chain of stitching, and a chain-severing device operating in the space between the front and rear feed dogs.

10. An apparatus for sewing filled bags, comprising a sewing mechanism including a feeding device having separated front and rear feed dogs, the latter formed with a reccss between them, a conveyer for the bags,

and means for tilting the bags after the stitching has been performed, to draw the chain of stitching through the recess and into the space between the front and rear feed dogs, and a chain-severing device working in said space.

11. In asewmg machine, the combination of a needle, a feeding device,,a throat plate having an opening for the feeding device and complemental stitch-forming mechanism, a severing device including relatively movable cutting members, said throat plate being provided with a longitudinal slot extending from said feed opening past said cutting members, whereby the thread is guided to said cutting members;

I 12. In a sewing machine, a throat plate having openings for a plurality of feed dogs arranged tandem, and also being provided with a longitudinal slot for connecting said openings, and a clipper acting on one side of said longitudinal slot.

13. In a sewing machine stitch-forming mechanism including a needle, a feed dog having a portion in rear of the needle act- 'ing' on the chain of thread, a second feed dogin rear of the first named feed dog, and being provided with a longitudinal groove, whereby the chain of thread is guided and a chain-severing device for cutting the chain of thread.

14. In a filled bag sewing apparatus, a sewing head and a conveyer, a clipper, said sewing head having a two-part feeding device, the parts of which are located'upon opposite sides of the clipper, one of said parts having a longitudinal groove.

15. In a filled. bag sewing apparatus, a sewing head and a conveyer, said sewing head being provided with atwo-part feed and a throat plate, said throat plate having a slot connecting said feeds adapted to receive the chain of stitching.

In testimony whereof I afiix my signature in presence of two witnesses.

DUDLEY s. SEYMOUR.

lVitnesses:

A. B. CLOTHIER, C. MoNEIL. 

